Nut-lock.



WILLIAM'. MoCOaLOM, 0F CHICAGO, ILLINOIS.

NUT-Loox.

Bpecication of Letters Patent.

Patented Sept. 4, 1917.

Application led December 26, 1916. Serial No. 183,130.

To aZZ whom it may concern.'

Be it known that I, WILLIAM R. McCon- LoM, a citizen of the United States, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Nut-Loclts, of which the following is declared to be a full, clear, arid exact description.

This invention relates to nut locks, and particularly to that type of nut locks in which the locking device is made integral with the nut itself. The object of this invention is to simplify, to cheapen, and to produce a highly efficient lock nut. With these and other objects in view, this invention consists in the several novel features hereinafter fully set forth and claimed.

The invention is clearly illustrated in the accompanying drawing, in which;

Figure 1, is a perspective view of an ordinary bolt; Fig. 2, is a perspective view of the nut; Fig. 3, is a side view of a fragment of the bolt and the nut, showing an object which is to be held thereby, in cross section; Fig. 4, is a view similar to Fig. 3, except that thenut has been screwed home; Fig. 5,

is a cross section taken on line 5-5 of Fig. 3; Fig. 6, is a cross section taken on line 6 6 of Fig. 4; and Fig. 7, is a longitudinal section taken on line 7-7 of Fig. 4.

` Referring to said drawing, A, designates a screw threaded bolt .or other threaded rod having a head 10, on one end. 11 designates the object through which the bolt or rod extends, and 12, designates the nut. The bolt has screw threads 13, formed upon one end and the nut has internal screw threads 9, corresponding tothe screw threads on the bolt, whereby it may be screwed thereon.

The side or face of the nut, which beans upon the object 11, against which theen'ut is screwed, has oppositel disposed portions 14, having arc shaped aces 14, which may be substantially cylindrical in form, the curved plane of which extends from one side of the nut to the other; at the sides of said arc shaped portions, the faces 15, of the nut may be fiat, if desired. The arrangement is such that when the nut is screwed against an object, the crest or highest point 16, of the nut comes in contact with said object before the faces l5, contact with the object.

Adjacent said are shaped face, and extending parallel therewith, is a narrow slot 17, and theV arched portions 14, are formed with radial slits 17, thereby dividing each arched portion 14, into two bendableflugs, 18. It 1s to be understood that the internal screw threads of the nut are formed on the lugs 18, as well as in the main body portion 19, thereof. The metal at the sides of the slot 17 (indicated at 20) should be thick enough to effectively resist any appreciable movement of the lugs in a direction away from the bolt, when the nut is screwed down tight against any object.

In use, the nut is placed upon the threaded end of the bolt with the arched portions 14, facing the object which is to e held by the bolt and nut, and the nut is screwed up against said object, the crests of the two arched portions striking said object iirst when the nut contacts therewith. From this position, and until the nut is screwed home, the lugs 18, bend toward the object, the binding action taking place from the slitted ends of the lugs and outward, it being understood that side portions 20, ofthe nut, in moving from the position shown in Fig. 3, .to that shown in Fig. 4,

,force said lugs flat upon the object against which the nut is screwed. Since' the lugs 18, are held against appreciable outward movement by the portions 20, the lugs are crowded toward each other when bent flat and the screw threaded ends thereof consequently impinge against the threads of the.

bolt in a direction indicated by the arrows, a, Furthermore, since the free ends of the lugs, can not move down with the remainder of the nut, as it is being turned home, the threads at and near the said ends impinge against the threads of the bolt in the direction indicated by the arrow, b, this pressure increasing until the nut is screwed home. The pressure becomesrso great` that the threads at the lugs and adaeent the free, ends thereof are distorted,

ut not permanently so because by applying great f ce the nut` ay be unscrewed without mut lating the t reads. 4The gripping and binding action eifectively holds the nut against unscrewing and positively locks it on the bolt.

I claim as new and desire to secure by Letters Patent:

1. A nut lock, comprising a nut body formedv with a lurality of bendable lugs extending tower th.` ceiter of the nut, said lugs being located on t" at side of the nut which contains its hearing face, the bearing face of said lugs being of arched formntion, and said body and lugs being internally screw threaded.

2. A nut lock, comprising si nut body formed with a plurality of uppositely disposed, bendahlc lugs, projcctin Lown rd the middle of the nut :from two 0 its opposite sides, said lugs being located on thm side of the nut which contains its bearing fece,

'and being archedtowa'rd. the middle of the nut, the body and lugs being internally screw threaded.

3. A nut. lock, comprising a, nut body having oppostely disposed, bendable 1ugs,

projecting toward the middle of the nut, said lugs having arched hearing surfaces, und the nut body and lugs being internally scrl-,w threaded.

4. A lock nut, comprising a body portion, oppositcly disposed, hendnhie ings project ing inwnrdly from the edges of the nut, Suid lugs being spaced 'from die body and conneuted therewithv Lntegrzd connecting portions, the lugs being.;` located en the bearing side of the nut and being arched t0- wnrd the middle of the nutg and there being Hut bearing faces adjacent said lugs.

WILLAM R. MCCOLLGM. 

